The Parisian sees off the tenant (6)
I believe the answer is:
lessee
'the tenant' is the definition.
(lessee is a kind of tenant)
'the parisian sees off' is the wordplay.
'the parisian' becomes 'le' (definite article in French).
'off' indicates anagramming the letters.
'sees' anagrammed gives 'ssee'.
'le'+'ssee'='LESSEE'
(Other definitions for lessee that I've seen before include "Contractor" , "One holding lease on property" , "Person renting a property" , "Hirer of property" , "One granted temporary use of property" .)